FR2669364A1 - Device for making completely impervious the vertical connections of shuttering panel elements in concrete structures - Google Patents

Abstract

The invention relates to a device with which it is possible to prevent the escape of laitance in the area of the vertical connections of the shuttering panels at the moment of the use and internal vibration of the concrete. The device consists of a rigid filling (3) supporting a flexible seal (5) which is fixed to the inside of the vertical stiffening element (2) integral with the end of the shuttering panel (1). The flexible seal (5) blocked in a vertical housing (4) formed by the filling (3) and the inner wing of the stiffening element (2) ensures a complete imperviousness once the connection has been made between two shuttering elements (1) situated in the same plane (the same form lining).

Description

 The present invention relates to a sealing device which makes it possible to avoid any leakage of milt (water + cement + fines) between 2 elements juxtaposed with formwork panels when pouring concrete structures.

 Traditionally, the vertical ends of formwork formwork elements are fixed end to end, so as to obtain the desired formwork length.

 The connection thus produced makes it possible to ensure continuity of the planimetry of the assembly but leaves free interstices conducive to leakage of laitance.

 These laitance leaks will promote, at the time of pouring, a segregation of the concrete which will result in a lack of cohesion of the aggregates or a lack of coating and an aspect of the final facing revealing cavities commonly called nests of sand or nests of gravel ".

Asperities or cement runouts may also remain after formwork is removed.

 These appearance defects or roughness must then be subject to recovery and use of suitable surfacing plasters.

 The device according to the invention aims to eliminate these drawbacks.

 It allows a flexible and tight clamping between 2 vertical elements of formwork formwork. This contributes, when placing the concrete, to keep all its technical characteristics and all of its components, that is to say: water, cement, sand, gravel, additives.

 The result after formwork removal is a smooth, uniform and continuous appearance of the facing.

The means used to obtain this result are as follows:
Figures 1 and 2 show in section and in perspective the device according to the invention.

 With reference to these drawings, the device comprises a rigid fur (3) of height equal to the stiffener (2) secured to the end of the formwork section (1) in which it is embedded.

 This fur (3) has a square section etching (4) in which a flexible seal (5) is blocked.

 This fur (3) is held in the stiffener by means of appropriate fasteners (6).

 This fur has 2 chamfers (7) which allow it to fit perfectly into the profile of the stiffener (2).

 The seal (5) is used in the form of a flexible bead of cross section and density judiciously chosen commercially.

 This seal (5) rubber or synthetic material blocked between the fur (3) and the inner wing of the stiffener (2) will be crushed on the opposite seal (5) and similar equipping the end of another element ( 1) formwork formwork fitted with the same device.

 The mechanical connection of the 2 formwork elements (1) will thus be completed by a sealed connection provided by the plating of the joints (5).

 The device according to the invention can be used to seal the formwork of vertical concrete structures.

 This device can be adapted to different types and forms of formwork such as: curved formwork, sliding formwork, standard formwork.

 By way of nonlimiting example, the device will have dimensions of the order of 3 cm for the thickness and 6 cm for the width.

The height remains variable.

Claims (7)

 1) Device for making the vertical connections of waterproofing formwork elements perfectly watertight in that it comprises a rigid furring (3) flexible joint support (5) fixed inside a vertical stiffener (2) integral end of formwork formwork (1).  2) Device according to claim 1 characterized by a compressible seal (5) blocked between the fur (3) and the inner wing of the stiffener (2) ensuring a perfect vertical seal at the time of connection and tightening of 2 elements of formwork formwork (1).  3) Device according to claim 1 or claim 2 characterized by a fur (3) of appropriate section whose outer face (view side) is positioned set back from the end of the formwork (1) to allow the joint (5) d 'ensure its function.  4) Device according to claim No. 3 characterized in that the fur is blocked in the stiffener by means of removable fasteners.  5) Device according to any one of the preceding claims may be the subject of a variant characterized by the replacement of the rigid fur (3) by a section of section equivalent to the engraving (4) fixed directly to the stiffener.  6) Device according to any one of the preceding claims may be the subject of a horizontal application when superimposing 2 elements of formwork formwork.  7) Device according to claim 1 characterized by the use of formwork formwork (1) for concrete structures.